Are you talking about one from the floor of a 73-87 going into a 67-72, or are you talking about cutting a section from a 73-87 and it working on a hole in the 67-72? If it is the later, it should work as long as it is nothing specific to the 73-87, like the rear quarter section.
Alternatively I have a 67-72 bed patch that measures 48" long X 16" high that is ribbed like the original to repair sections. It is $24.99 + shipping. I can add it to the catalog for purchase if you want.
BTW, I also carry 67-72 parts, I am just slowly adding them to the catalog.
Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project